<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * write out a file to disk
 *
 * @param string $filename
 * @param string $contents
 * @param boolean $create_dirs
 * @return boolean
 */
function smarty_core_write_file($params, &$smarty)
{
	$_dirname = dirname($params['filename']);

	if ($params['create_dirs']) {
		$_params = array('dir' => $_dirname);
		require_once(SMARTY_CORE_DIR . 'core.create_dir_structure.php');
		smarty_core_create_dir_structure($_params, $smarty);
	}

	// write to tmp file, then rename it to avoid file locking race condition
	$_tmp_file = tempnam($_dirname, 'wrt');

	if (!($fd = @fopen($_tmp_file, 'wb'))) {
		$_tmp_file = $_dirname . DIRECTORY_SEPARATOR . uniqid('wrt');
		if (!($fd = @fopen($_tmp_file, 'wb'))) {
			$smarty->trigger_error("problem writing temporary file '$_tmp_file'");
			return false;
		}
	}

	fwrite($fd, $params['contents']);
	fclose($fd);

	if (PHP_OS == 'Windows' || !@rename($_tmp_file, $params['filename'])) {
		// On platforms and filesystems that cannot overwrite with rename()
		// delete the file before renaming it -- because windows always suffers
		// this, it is short-circuited to avoid the initial rename() attempt
		@unlink($params['filename']);
		@rename($_tmp_file, $params['filename']);
	}
	@chmod($params['filename'], $smarty->_file_perms);

	return true;
}

/* vim: set expandtab: */

?>